update stuff

bg.js

@@ -0,0 +1,17 @@
+browser.runtime.onInstalled.addListener((ev) => {
+    if (ev.reason == "update") {
+        launchInfoPage();
+        // TODO determine how to launch the page only when there are important changes
+    } else if (ev.reason == "install") {
+        browser.runtime.openOptionsPage()
+    }
+})
+
+async function updateIsSignificant(previousVersion) {
+    const significantUpdates = ["0.1.0", "0.2.0", "0.3.0"];
+    let currentVersion = (await browser.management.getSelf()).version;
+    return currentVersion in significantUpdates;
+}
+function launchInfoPage(){
+    browser.tabs.create({url: "/changelog.htm", active: false})
+}